I see that this has a CVE associated with it that Ubuntu rates "High" Severity: https://ubuntu.com/security/CVE-2025-63757
What is actually vulnerable here? A vulnerability that a pixel value might theoretically be wrong. Kieran On Tue, 14 Oct 2025, 20:13 Michael Niedermayer via ffmpeg-devel, < [email protected]> wrote: > On Mon, Oct 13, 2025 at 05:20:55PM +0100, Kieran Kunhya via ffmpeg-devel > wrote: > > On Mon, 13 Oct 2025, 14:28 michaelni via ffmpeg-devel, < > > [email protected]> wrote: > > > > > PR #20698 opened by michaelni > > > URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/20698 > > > Patch URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/20698.patch > > > > > > > > > >From 93794583405909cfe8e7abffdd84c2454959ff18 Mon Sep 17 00:00:00 2001 > > > From: Michael Niedermayer <[email protected]> > > > Date: Mon, 13 Oct 2025 14:32:45 +0200 > > > Subject: [PATCH 1/2] swscale/output: Fix integer overflow in > > > yuv2ya16_X_c_template() > > > > > > Found-by: colod colod <[email protected]> > > > > > > Signed-off-by: Michael Niedermayer <[email protected]> > > > --- > > > libswscale/output.c | 4 ++-- > > > 1 file changed, 2 insertions(+), 2 deletions(-) > > > > > > diff --git a/libswscale/output.c b/libswscale/output.c > > > index b873276c00..cb6630bd73 100644 > > > --- a/libswscale/output.c > > > +++ b/libswscale/output.c > > > @@ -1028,7 +1028,7 @@ yuv2ya16_X_c_template(SwsInternal *c, const > int16_t > > > *lumFilter, > > > int A = 0xffff; > > > > > > for (j = 0; j < lumFilterSize; j++) > > > - Y += (unsigned)(lumSrc[j][i] * lumFilter[j]); > > > + Y += lumSrc[j][i] * (unsigned)lumFilter[j]; > > > > > > Y >>= 15; > > > Y += (1<<3) + 0x8000; > > > @@ -1037,7 +1037,7 @@ yuv2ya16_X_c_template(SwsInternal *c, const > int16_t > > > *lumFilter, > > > if (hasAlpha) { > > > A = -0x40000000 + (1<<14); > > > for (j = 0; j < lumFilterSize; j++) > > > - A += (unsigned)(alpSrc[j][i] * lumFilter[j]); > > > + A += alpSrc[j][i] * (unsigned)lumFilter[j]; > > > > > > A >>= 15; > > > A += 0x8000; > > > -- > > > 2.49.1 > > > > > > > > > >From 9d0761453e5ecaa1344d63e2fcc9bd3cc6d4d0f6 Mon Sep 17 00:00:00 2001 > > > From: Michael Niedermayer <[email protected]> > > > Date: Mon, 13 Oct 2025 14:46:16 +0200 > > > Subject: [PATCH 2/2] swscale/output: Fix unsigned cast position in > yuv2* > > > > > > Fixes: signed overflow > > > > > > Signed-off-by: Michael Niedermayer <[email protected]> > > > --- > > > libswscale/output.c | 90 ++++++++++++++++++++++----------------------- > > > 1 file changed, 45 insertions(+), 45 deletions(-) > > > > > > diff --git a/libswscale/output.c b/libswscale/output.c > > > index cb6630bd73..877db04f36 100644 > > > --- a/libswscale/output.c > > > +++ b/libswscale/output.c > > > @@ -503,8 +503,8 @@ static void yuv2nv12cX_c(enum AVPixelFormat > dstFormat, > > > const uint8_t *chrDither, > > > int v = chrDither[(i + 3) & 7] << 12; > > > int j; > > > for (j=0; j<chrFilterSize; j++) { > > > - u += (unsigned)(chrUSrc[j][i] * chrFilter[j]); > > > - v += (unsigned)(chrVSrc[j][i] * chrFilter[j]); > > > + u += chrUSrc[j][i] * (unsigned)chrFilter[j]; > > > + v += chrVSrc[j][i] * (unsigned)chrFilter[j]; > > > } > > > > > > dest[2*i]= av_clip_uint8(u>>19); > > > @@ -516,8 +516,8 @@ static void yuv2nv12cX_c(enum AVPixelFormat > dstFormat, > > > const uint8_t *chrDither, > > > int v = chrDither[(i + 3) & 7] << 12; > > > int j; > > > for (j=0; j<chrFilterSize; j++) { > > > - u += (unsigned)(chrUSrc[j][i] * chrFilter[j]); > > > - v += (unsigned)(chrVSrc[j][i] * chrFilter[j]); > > > + u += chrUSrc[j][i] * (unsigned)chrFilter[j]; > > > + v += chrVSrc[j][i] * (unsigned)chrFilter[j]; > > > } > > > > > > dest[2*i]= av_clip_uint8(v>>19); > > > @@ -577,8 +577,8 @@ static void yuv2p01xcX_c(int big_endian, const > uint8_t > > > *chrDither, > > > int v = 1 << (shift - 1); > > > > > > for (j = 0; j < chrFilterSize; j++) { > > > - u += (unsigned)(chrUSrc[j][i] * chrFilter[j]); > > > - v += (unsigned)(chrVSrc[j][i] * chrFilter[j]); > > > + u += chrUSrc[j][i] * (unsigned)chrFilter[j]; > > > + v += chrVSrc[j][i] * (unsigned)chrFilter[j]; > > > } > > > > > > output_pixel(&dest[2*i] , u); > > > @@ -678,8 +678,8 @@ yuv2mono_X_c_template(SwsInternal *c, const int16_t > > > *lumFilter, > > > int Y2 = 1 << 18; > > > > > > for (j = 0; j < lumFilterSize; j++) { > > > - Y1 += (unsigned)(lumSrc[j][i] * lumFilter[j]); > > > - Y2 += (unsigned)(lumSrc[j][i+1] * lumFilter[j]); > > > + Y1 += lumSrc[j][i] * (unsigned)lumFilter[j]; > > > + Y2 += lumSrc[j][i+1] * (unsigned)lumFilter[j]; > > > } > > > Y1 >>= 19; > > > Y2 >>= 19; > > > @@ -896,12 +896,12 @@ yuv2422_X_c_template(SwsInternal *c, const > int16_t > > > *lumFilter, > > > int V = 1 << 18; > > > > > > for (j = 0; j < lumFilterSize; j++) { > > > - Y1 += (unsigned)(lumSrc[j][i * 2] * lumFilter[j]); > > > - Y2 += (unsigned)(lumSrc[j][i * 2 + 1] * lumFilter[j]); > > > + Y1 += lumSrc[j][i * 2] * (unsigned)lumFilter[j]; > > > + Y2 += lumSrc[j][i * 2 + 1] * (unsigned)lumFilter[j]; > > > } > > > for (j = 0; j < chrFilterSize; j++) { > > > - U += (unsigned)(chrUSrc[j][i] * chrFilter[j]); > > > - V += (unsigned)(chrVSrc[j][i] * chrFilter[j]); > > > + U += chrUSrc[j][i] * (unsigned)chrFilter[j]; > > > + V += chrVSrc[j][i] * (unsigned)chrFilter[j]; > > > } > > > Y1 >>= 19; > > > Y2 >>= 19; > > > @@ -1802,12 +1802,12 @@ yuv2rgb_X_c_template(SwsInternal *c, const > int16_t > > > *lumFilter, > > > const void *r, *g, *b; > > > > > > for (j = 0; j < lumFilterSize; j++) { > > > - Y1 += (unsigned)(lumSrc[j][i * 2] * lumFilter[j]); > > > - Y2 += (unsigned)(lumSrc[j][i * 2 + 1] * lumFilter[j]); > > > + Y1 += lumSrc[j][i * 2] * (unsigned)lumFilter[j]; > > > + Y2 += lumSrc[j][i * 2 + 1] * (unsigned)lumFilter[j]; > > > } > > > for (j = 0; j < chrFilterSize; j++) { > > > - U += (unsigned)(chrUSrc[j][i] * chrFilter[j]); > > > - V += (unsigned)(chrVSrc[j][i] * chrFilter[j]); > > > + U += chrUSrc[j][i] * (unsigned)chrFilter[j]; > > > + V += chrVSrc[j][i] * (unsigned)chrFilter[j]; > > > } > > > Y1 >>= 19; > > > Y2 >>= 19; > > > @@ -1817,8 +1817,8 @@ yuv2rgb_X_c_template(SwsInternal *c, const > int16_t > > > *lumFilter, > > > A1 = 1 << 18; > > > A2 = 1 << 18; > > > for (j = 0; j < lumFilterSize; j++) { > > > - A1 += (unsigned)(alpSrc[j][i * 2 ] * lumFilter[j]); > > > - A2 += (unsigned)(alpSrc[j][i * 2 + 1] * lumFilter[j]); > > > + A1 += alpSrc[j][i * 2 ] * (unsigned)lumFilter[j]; > > > + A2 += alpSrc[j][i * 2 + 1] * (unsigned)lumFilter[j]; > > > } > > > A1 >>= 19; > > > A2 >>= 19; > > > @@ -2179,11 +2179,11 @@ yuv2rgb_full_X_c_template(SwsInternal *c, const > > > int16_t *lumFilter, > > > int V = (1<<9)-(128 << 19); > > > > > > for (j = 0; j < lumFilterSize; j++) { > > > - Y += (unsigned)(lumSrc[j][i] * lumFilter[j]); > > > + Y += lumSrc[j][i] * (unsigned)lumFilter[j]; > > > } > > > for (j = 0; j < chrFilterSize; j++) { > > > - U += (unsigned)(chrUSrc[j][i] * chrFilter[j]); > > > - V += (unsigned)(chrVSrc[j][i] * chrFilter[j]); > > > + U += chrUSrc[j][i] * (unsigned)chrFilter[j]; > > > + V += chrVSrc[j][i] * (unsigned)chrFilter[j]; > > > } > > > Y >>= 10; > > > U >>= 10; > > > @@ -2191,7 +2191,7 @@ yuv2rgb_full_X_c_template(SwsInternal *c, const > > > int16_t *lumFilter, > > > if (hasAlpha) { > > > A = 1 << 18; > > > for (j = 0; j < lumFilterSize; j++) { > > > - A += (unsigned)(alpSrc[j][i] * lumFilter[j]); > > > + A += alpSrc[j][i] * (unsigned)lumFilter[j]; > > > } > > > A >>= 19; > > > if (A & 0x100) > > > @@ -2360,11 +2360,11 @@ yuv2gbrp_full_X_c(SwsInternal *c, const int16_t > > > *lumFilter, > > > int R, G, B; > > > > > > for (j = 0; j < lumFilterSize; j++) > > > - Y += (unsigned)(lumSrc[j][i] * lumFilter[j]); > > > + Y += lumSrc[j][i] * (unsigned)lumFilter[j]; > > > > > > for (j = 0; j < chrFilterSize; j++) { > > > - U += (unsigned)(chrUSrc[j][i] * chrFilter[j]); > > > - V += (unsigned)(chrVSrc[j][i] * chrFilter[j]); > > > + U += chrUSrc[j][i] * (unsigned)chrFilter[j]; > > > + V += chrVSrc[j][i] * (unsigned)chrFilter[j]; > > > } > > > > > > Y >>= 10; > > > @@ -2375,7 +2375,7 @@ yuv2gbrp_full_X_c(SwsInternal *c, const int16_t > > > *lumFilter, > > > A = 1 << 18; > > > > > > for (j = 0; j < lumFilterSize; j++) > > > - A += (unsigned)(alpSrc[j][i] * lumFilter[j]); > > > + A += alpSrc[j][i] * (unsigned)lumFilter[j]; > > > > > > if (A & 0xF8000000) > > > A = av_clip_uintp2(A, 27); > > > @@ -2679,7 +2679,7 @@ yuv2ya8_X_c(SwsInternal *c, const int16_t > *lumFilter, > > > int Y = 1 << 18, A = 1 << 18; > > > > > > for (j = 0; j < lumFilterSize; j++) > > > - Y += (unsigned)(lumSrc[j][i] * lumFilter[j]); > > > + Y += lumSrc[j][i] * (unsigned)lumFilter[j]; > > > > > > Y >>= 19; > > > if (Y & 0x100) > > > @@ -2687,7 +2687,7 @@ yuv2ya8_X_c(SwsInternal *c, const int16_t > *lumFilter, > > > > > > if (hasAlpha) { > > > for (j = 0; j < lumFilterSize; j++) > > > - A += (unsigned)(alpSrc[j][i] * lumFilter[j]); > > > + A += alpSrc[j][i] * (unsigned)lumFilter[j]; > > > > > > A >>= 19; > > > > > > @@ -2793,11 +2793,11 @@ yuv2v30_X_c_template(SwsInternal *c, const > int16_t > > > *lumFilter, > > > int j; > > > > > > for (j = 0; j < lumFilterSize; j++) > > > - Y += (unsigned)(lumSrc[j][i] * lumFilter[j]); > > > + Y += lumSrc[j][i] * (unsigned)lumFilter[j]; > > > > > > for (j = 0; j < chrFilterSize; j++) { > > > - U += (unsigned)(chrUSrc[j][i] * chrFilter[j]); > > > - V += (unsigned)(chrVSrc[j][i] * chrFilter[j]); > > > + U += chrUSrc[j][i] * (unsigned)chrFilter[j]; > > > + V += chrVSrc[j][i] * (unsigned)chrFilter[j]; > > > } > > > > > > Y = av_clip_uintp2(Y >> 17, 10); > > > @@ -2847,11 +2847,11 @@ yuv2xv36_X_c(SwsInternal *c, const int16_t > > > *lumFilter, > > > int j; > > > > > > for (j = 0; j < lumFilterSize; j++) > > > - Y += (unsigned)(lumSrc[j][i] * lumFilter[j]); > > > + Y += lumSrc[j][i] * (unsigned)lumFilter[j]; > > > > > > for (j = 0; j < chrFilterSize; j++) { > > > - U += (unsigned)(chrUSrc[j][i] * chrFilter[j]); > > > - V += (unsigned)(chrVSrc[j][i] * chrFilter[j]); > > > + U += chrUSrc[j][i] * (unsigned)chrFilter[j]; > > > + V += chrVSrc[j][i] * (unsigned)chrFilter[j]; > > > } > > > > > > output_pixels(dest + 8 * i + 2, Y, 15, 12, 4) > > > @@ -3011,13 +3011,13 @@ yuv2ayuv_X_c_template(SwsInternal *c, const > > > int16_t *lumFilter, > > > int V = 1 << 18, A = 255; > > > > > > for (j = 0; j < lumFilterSize; j++) > > > - Y += (unsigned)(lumSrc[j][i] * lumFilter[j]); > > > + Y += lumSrc[j][i] * (unsigned)lumFilter[j]; > > > > > > for (j = 0; j < chrFilterSize; j++) > > > - U += (unsigned)(chrUSrc[j][i] * chrFilter[j]); > > > + U += chrUSrc[j][i] * (unsigned)chrFilter[j]; > > > > > > for (j = 0; j < chrFilterSize; j++) > > > - V += (unsigned)(chrVSrc[j][i] * chrFilter[j]); > > > + V += chrVSrc[j][i] * (unsigned)chrFilter[j]; > > > > > > Y >>= 19; > > > U >>= 19; > > > @@ -3034,7 +3034,7 @@ yuv2ayuv_X_c_template(SwsInternal *c, const > int16_t > > > *lumFilter, > > > A = 1 << 18; > > > > > > for (j = 0; j < lumFilterSize; j++) > > > - A += (unsigned)(alpSrc[j][i] * lumFilter[j]); > > > + A += alpSrc[j][i] * (unsigned)lumFilter[j]; > > > > > > A >>= 19; > > > > > > @@ -3105,13 +3105,13 @@ AYUVPACKEDWRAPPER(uyva, AV_PIX_FMT_UYVA) > > > int U = 1 << (shift - 1), V = 1 << (shift - 1); > \ > > > > \ > > > for (j = 0; j < lumFilterSize; j++) { > \ > > > - Y1 += (unsigned)(lumSrc[j][i * 2] * lumFilter[j]); > > > \ > > > - Y2 += (unsigned)(lumSrc[j][i * 2 + 1] * lumFilter[j]); > > > \ > > > + Y1 += lumSrc[j][i * 2] * (unsigned)lumFilter[j]; > > > \ > > > + Y2 += lumSrc[j][i * 2 + 1] * (unsigned)lumFilter[j]; > > > \ > > > } > \ > > > > \ > > > for (j = 0; j < chrFilterSize; j++) { > \ > > > - U += (unsigned)(chrUSrc[j][i] * chrFilter[j]); > > > \ > > > - V += (unsigned)(chrVSrc[j][i] * chrFilter[j]); > > > \ > > > + U += chrUSrc[j][i] * (unsigned)chrFilter[j]; > > > \ > > > + V += chrVSrc[j][i] * (unsigned)chrFilter[j]; > > > \ > > > } > \ > > > > \ > > > output_pixel(dest + 8 * i + 0, Y1, bits); > \ > > > @@ -3259,13 +3259,13 @@ yuv2vyu444_X_c(SwsInternal *c, const int16_t > > > *lumFilter, > > > int V = 1 << 18; > > > > > > for (j = 0; j < lumFilterSize; j++) > > > - Y += (unsigned)(lumSrc[j][i] * lumFilter[j]); > > > + Y += lumSrc[j][i] * (unsigned)lumFilter[j]; > > > > > > for (j = 0; j < chrFilterSize; j++) > > > - U += (unsigned)(chrUSrc[j][i] * chrFilter[j]); > > > + U += chrUSrc[j][i] * (unsigned)chrFilter[j]; > > > > > > for (j = 0; j < chrFilterSize; j++) > > > - V += (unsigned)(chrVSrc[j][i] * chrFilter[j]); > > > + V += chrVSrc[j][i] * (unsigned)chrFilter[j]; > > > > > > Y >>= 19; > > > U >>= 19; > > > -- > > > 2.49.1 > > > > > > > Seems fine > > applied > > thx > > [...] > -- > Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB > > Those who would give up essential Liberty, to purchase a little > temporary Safety, deserve neither Liberty nor Safety -- Benjamin Franklin > _______________________________________________ > ffmpeg-devel mailing list -- [email protected] > To unsubscribe send an email to [email protected] > _______________________________________________ ffmpeg-devel mailing list -- [email protected] To unsubscribe send an email to [email protected]
