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charset=\"utf-8\"","Content-Transfer-Encoding":"base64","Errors-To":"kernel-team-bounces@lists.ubuntu.com","Sender":"\"kernel-team\" "},"content":"From: Herbert Xu \n\ncommit 3d14bd48e3a77091cbce637a12c2ae31b4a1687c upstream.\n\nThe check for the minimum receive buffer size did not take the\ntag size into account during decryption. Fix this by adding the\nrequired extra length.\n\nReported-by: syzbot+aa11561819dc42ebbc7c@syzkaller.appspotmail.com\nReported-by: Daniel Pouzzner \nFixes: d887c52d6ae4 (\"crypto: algif_aead - overhaul memory management\")\nSigned-off-by: Herbert Xu \nSigned-off-by: Eric Biggers \nSigned-off-by: Greg Kroah-Hartman \n(cherry picked from commit fd427dd84f224309afbcc2cb67c7bb770a01265c linux-5.15.y)\nCVE-2026-31431\nSigned-off-by: Massimiliano Pellizzer \n---\n crypto/algif_aead.c | 2 +-\n 1 file changed, 1 insertion(+), 1 deletion(-)","diff":"diff --git a/crypto/algif_aead.c b/crypto/algif_aead.c\nindex 24e77f4968a61..4a285994d106c 100644\n--- a/crypto/algif_aead.c\n+++ b/crypto/algif_aead.c\n@@ -150,7 +150,7 @@ static int _aead_recvmsg(struct socket *sock, struct msghdr *msg,\n \tif (usedpages < outlen) {\n \t\tsize_t less = outlen - usedpages;\n \n-\t\tif (used < less) {\n+\t\tif (used < less + (ctx->enc ? 0 : as)) {\n \t\t\terr = -EINVAL;\n \t\t\tgoto free;\n \t\t}\n","prefixes":["SRU","J","v2","9/9"]}